20Y-54-39520 Komatsu Rubber Engine Mount — PC200 & PC220 Excavator Series
OEM-Equivalent • ISO 9001:2015 Certified • Komatsu PC200-7 • In Stock
Product Overview
The 20Y-54-39520 is a rubber engine mount used on Komatsu PC200 and PC220 series hydraulic excavators across the -7 and -8 generation platforms. These 20-22 tonne excavators are among the most widely deployed construction machines globally, found on virtually every type of earthmoving project from residential site preparation to highway construction and utility trenching.
The mount isolates the SAA6D107E/SAA6D102E powerplant from the revolving frame, absorbing the irregular vibration patterns generated by variable-speed hydraulic pump loading. The 20Y-54-39520 is specifically calibrated for the lower engine weight and different vibration profile of the PC200/PC220 compared to larger PC300-class machines that use the 17A-54-46120 mount.
The PC200 is the world's best-selling excavator class. Fleet operators managing multiple PC200 units benefit from our volume pricing on the 20Y-54-39520 — contact us for fleet discount quotations. We maintain permanent stock for immediate shipment worldwide.
Technical Specifications
| Property | Specification |
|---|---|
| Part Number | 20Y-54-39520 |
| OEM Brand | Komatsu |
| Type | Rubber Engine Mount / Anti-Vibration Mount |
| Compatible Equipment | Komatsu PC200-7, PC200-8, PC200LC-7, PC200LC-8, PC220-7, PC220-8, PC220LC-8 |
| Cross-Reference | 20Y-54-39530 (alternate position) |
| Material | Natural Rubber (NR) Compound |
| Hardness | 55 ± 5 Shore A (ISO 48-4) |
| Tensile Strength | ≥ 12 MPa (ISO 37) |
| Elongation at Break | ≥ 350% |
| Temperature Range | −40°C to +90°C |
| Compression Set | ≤ 25% (ISO 815-1) |
| Quality | ISO 9001:2015 Certified |
| Availability | In Stock — Ships Worldwide |
Compatible Komatsu Equipment
- Komatsu PC200-7, PC200-8 — 20-tonne hydraulic excavator
- Komatsu PC200LC-7, PC200LC-8 — 20-tonne long-carriage variant
- Komatsu PC220-7, PC220-8 — 22-tonne production excavator
Always verify your machine model and serial number before ordering. Contact us for free cross-reference verification.
Key Features & Benefits
OEM-Equivalent Quality
Manufactured to Komatsu's original engineering specifications with ±0.5 mm dimensional tolerance. Direct bolt-on replacement with no modifications required. Metal components zinc-plated for corrosion resistance.
Extreme Temperature Range
Operational from −40°C to +90°C, covering Arctic mining to tropical construction sites. IPPD/TMQ antioxidant system prevents thermal degradation. Anti-ozonant wax migration protects surface integrity.
Extended Service Life
Engineered for 5,000 to 10,000 operating hours under standard duty cycles. HAF carbon black reinforcement provides exceptional fatigue crack resistance through millions of load cycles.
Global Express Shipping
In stock and ships worldwide in 3–5 business days via DHL, FedEx, or UPS. Full commercial documentation included for seamless customs clearance in all major markets.
Performance Specifications
| Property | Specification | Test Method |
|---|---|---|
| Hardness | 55 ± 5 Shore A | ISO 48-4 |
| Tensile Strength | ≥ 12 MPa | ISO 37 |
| Elongation at Break | ≥ 350% | ISO 37 |
| Compression Set (24h @ 70°C) | ≤ 25% | ISO 815-1 |
| Tear Strength | ≥ 25 kN/m | ISO 34-1 |
| Accelerated Aging (72h @ 100°C) | Hardness change ≤ 8 IRHD | ISO 188 |
| Ozone Resistance (200 pphm, 48h) | No cracks at 20% strain | ISO 1431-1 |
| Operating Temperature | −40°C to +90°C | Continuous |
Maintenance & Expected Lifespan
Under standard operating conditions, the 20Y-54-39520 has an expected service life of 5,000 to 10,000 operating hours. In severe duty applications (24/7 mining, extreme temperatures, high dust), service life may be reduced. Inspect at every major service interval (2,000 hours) for surface cracking, compression set, oil contamination, and mounting hardware integrity.
Replacement criteria: Replace when surface cracks exceed 2 mm depth, compression set exceeds 30%, rubber shows oil swelling, or the operator reports increased vibration. Always replace all mounts simultaneously for optimal isolation performance.
